CN203645474U - Cooling oil direct spray type motor cooling device - Google Patents

Abstract

The utility model discloses a coolant oil direct-spraying type motor cooling device. The motor cooling device comprises a heat radiator, an oil pump, a fine filter, a drier, multiple nozzles, an oil sump and a coarse strainer. The heat radiator, the oil pump, the fine filter and the drier are sequentially connected through pipelines. The drier is connected with the multiple nozzles through pipelines. The multiple nozzles are mounted on a motor housing. At least one nozzle is communicated with an inner rotor or a stator on an inner side of the motor, and at least one another nozzle directly faces a stator on or a rotor housing an outer side of the motor. The oil sump is disposed at an inner end of the bottom of the motor housing, and is connected with the coarse filter. The coarse filter is connected with the heat radiator. The coolant oil direct-spraying type motor cooling device sprays a cooling medium directly to a motor stator (rotor) winding, is not limited by a motor model or a rotor position, and the adopted cooling medium can be utilized to lubricate a rolling bearing or a sliding bearing in the motor, and thus the coolant oil direct-spraying type motor cooling device cannot only effectively cool a motor winding but also realizes integration of a cooling and lubricating system of the motor, and has the advantages of relatively low cost, good cooling effect, etc.

Description

Cooling oil direct spray type motor cooling device

technical field

The utility model relates to a cooling device for a motor, in particular to a cooling device for a motor working in the manner of directly spraying a cooling medium to the stator (rotor) of the motor.

Background technique

With the increasing tension of fossil energy and environmental problems, electric vehicles are getting more and more attention. In order to meet the driving requirements of electric vehicles, the driving motor needs to have a higher power density, which will make the motor heat more serious. Therefore, an efficient motor winding cooling solution has become an urgent need for the development of electric vehicle driving motors.

At present, the cooling methods of motor windings are mainly air cooling and circulating water cooling. The cooling effect of air cooling increases as the fan speed increases, but the higher the fan speed, the greater the resistance, which will reduce the overall efficiency of the motor and easily cause vibration and noise problems, so it is only used on smaller motors. The cooling effect of circulating water cooling is better than that of air cooling, but the cooling water channel often needs to be specially designed, resulting in complex structure, difficult processing, high manufacturing and maintenance costs; leakage of cooling water into the motor will dilute the grease of the motor bearing, reduce the life of the bearing, and For motors with an inner stator and outer rotor structure, the armature windings are difficult to cool.

Application No. 01139907.4 Chinese Utility Model Patent proposes a motor cooling device consisting of a rotor protruding in various directions at both ends and a plurality of identical vanes that generate flowing airflow when the rotor rotates. It uses the airflow generated by the rotation of the rotor to cool the motor windings, which is air-cooled in nature. Although the fan is omitted to make the structure more compact, it is still difficult to avoid the shortcomings of the above-mentioned air-cooled system, and the structure of the rotor and blades is complicated. manufacturing difficulty.

The Chinese utility model patent with application number 200580031556.6 adopts the method of arranging heat pipes on the motor shell or stator to cool the motor windings. Due to the good thermal conductivity of the heat pipe, this solution can obtain a better cooling effect. But heat pipes are expensive, and it is difficult to cool the rotor windings, because holes need to be dug in the casing or stator, and the rigidity of the casing will be reduced.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the above-mentioned existing motor winding cooling system, and provide a cooling oil direct spray motor cooling device with good cooling effect and not limited by the type of motor.

The utility model purpose is realized through the following technical solutions:

A cooling oil direct spray type motor cooling device, comprising a radiator, an oil pump, a fine filter, a drier, a nozzle, an oil pan and a coarse filter; there are multiple nozzles, and the radiator, an oil pump, a fine filter and a drier The dryer is connected to multiple nozzles through pipelines in sequence; multiple nozzles are set on the motor housing, at least one nozzle communicates with the inner rotor or stator inside the motor, and at least one nozzle directly faces the stator outside the motor Or the rotor housing; the bottom inner end of the motor housing is provided with an oil pan, the oil pan is connected to the coarse filter, and the coarse filter is connected to the radiator.

Preferably, the motor used in the cooling oil direct spray type motor cooling device is a counter-rotating dual-rotor motor, and the counter-rotating dual-rotor motor includes a motor housing, an outer rotor winding and an inner rotor; the outer rotor winding passes through the outer rotor The casing is arranged on the motor shaft, and the outer rotor casing and the motor shaft are respectively connected through the first sliding bearing and the second sliding bearing; ring grooves are opened at both ends of the outer rotor casing along the circumferential direction, and there are four nozzles, of which the second The first nozzle and the fourth nozzle face the ring groove, and the cooling oil sprayed from the first nozzle and the fourth nozzle passes through these ring grooves directly to the winding and the inner rotor; the second nozzle and the third nozzle face the outer rotor shell without a ring the slot.

The motor used in the cooling oil direct spray type motor cooling device is a motor with an outer stator and an inner rotor structure, the motor with an outer stator and an inner rotor structure has an outer stator, and the motor housing is divided into two parts: an inner housing and an outer housing , the outer casing and the motor shaft are respectively connected through the first sliding bearing and the second sliding bearing; an annular cavity is formed between the inner and outer casings, the stator is fixed on the inner casing; the rotor is fixed on the motor shaft; there are 4 nozzles, of which The second nozzle and the third nozzle are inserted from the outer casing, facing the stator core in the annular cavity; the first nozzle and the fourth nozzle pass through the inner and outer casing, facing the stator winding and the rotor.

The motor used in the cooling oil direct spray type motor cooling device is a motor with an outer rotor inner stator structure, the stator of the motor with an outer rotor inner stator structure is inside, and the rotor is outside; the motor housing has only one layer, There are four nozzles, the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are all arranged on the motor casing; the two ends of the outer rotor casing are respectively opened with 6 ring grooves along the circumferential direction, the first nozzle and the The fourth nozzle faces the ring groove, the cooling oil sprayed from the first nozzle and the fourth nozzle passes through these ring grooves and directly reaches the stator winding, and the second nozzle and the third nozzle face the part where the ring groove is not opened in the outer rotor shell.

The cooling oil direct spray type motor cooling device is used for DC motors, AC asynchronous motors, AC synchronous motors and permanent magnet motors with outer stator inner rotor or outer rotor inner stator structures.

The cooling oil is preferably insulating machine oil.

Compared with the prior art technology, the utility model has the following advantages:

1) The cooling oil of this utility model is directly sprayed on the stator (rotor) winding or iron core, and directly contacts with the heating element, which can absorb the heat of the motor to the maximum extent and obtain the best cooling effect.

2) A certain amount of cooling oil is accumulated at the bottom of the motor of the utility model to realize oil immersion (splash) cooling on the stator (rotor) of the motor and enhance the overall cooling effect of the system. Since the cooling oil can be sprayed onto the rotor winding, it can effectively solve the problem that the traditional water cooling system is difficult to cool the rotor winding.

3) The cooling medium used in this utility model has high insulation, good chemical stability and thermal oxidation stability, suitable viscosity, low pour point and flocculation point, low volatility, high lightning, and does not contain water and impurities Therefore, the cooling oil sprayed into the motor will not affect the electromagnetic performance of the motor, and can be used to lubricate the rolling bearings or sliding bearings in the motor, so as to realize the integration of the cooling and lubrication system of the motor, which not only solves the problem of water cooling system The problem of damage to bearings caused by leaking water is also beneficial to reduce costs.

Description of drawings

Fig. 1 is a schematic structural view of a cooling oil direct spraying motor cooling device in Embodiment 1 of the present utility model.

Fig. 2 is a side sectional view of the motor of Embodiment 1 of the present utility model.

Fig. 3 is a schematic structural view of the outer rotor casing related to Embodiment 1 and Embodiment 3 of the present utility model.

Fig. 4 is a structural schematic diagram of a cooling oil direct spraying motor cooling device according to Embodiment 2 of the present utility model.

Fig. 5 is a side sectional view of the motor of Embodiment 2 of the present utility model.

Fig. 6 is a schematic structural view of a cooling oil direct spraying motor cooling device according to Embodiment 3 of the present utility model.

Fig. 7 is a side sectional view of the motor of Embodiment 3 of the present utility model.

Detailed ways

In order to better understand the utility model, the utility model will be further described below in conjunction with the accompanying drawings and examples, but the implementation of the utility model is not limited to this.

Example 1

The counter-rotating double-rotor motor is a new type of electric drive system. It has no stator, and the inner and outer rotors rotate in different directions and output power to both sides respectively. Because the armature winding is rotating and has power output on both sides, it is difficult for traditional air-cooled and water-cooled systems to effectively cool the winding. This embodiment can well solve this problem.

As shown in Figure 1-3, a cooling oil direct spray motor cooling device is applied to the cooling of counter-rotating double-rotor motors. The cooling oil direct spray type motor cooling device includes a radiator 1, an oil pump 2, a fine filter 3, a dryer 6, a nozzle, an oil pan 15 and a coarse filter 16; there are a plurality of nozzles, respectively the first nozzle 7, the second Two nozzles 8, the third nozzle 10 and the fourth nozzle 11; the radiator 1, the oil pump 2, the fine filter 3 and the drier 6 are connected sequentially through pipelines, and the drier 6 is connected with a plurality of nozzles through pipelines; the first nozzle 7, the second nozzle The second nozzle 8, the third nozzle 10 and the fourth nozzle 11 are all arranged on the motor housing 9; the inner end of the bottom of the motor housing 9 is provided with an oil pan 15, and the oil pan 15 is connected with the coarse filter 16, and the coarse filter 16 is connected with the radiator 1; the counter-rotating double-rotor motor includes a motor housing 9, an outer rotor winding 12 and an inner rotor 13; the outer rotor winding 12 is arranged on the motor shaft through the outer rotor housing 17, and the outer rotor housing 17 and the The rotating shaft of the motor is connected through the first sliding bearing 4 and the second sliding bearing 14 respectively; 6 ring grooves are opened at both ends of the outer rotor housing 17 along the circumferential direction, wherein the first nozzle 7 and the fourth nozzle 11 face the ring groove, The cooling oil sprayed from the first nozzle 7 and the fourth nozzle 11 can directly reach the winding and the inner rotor through these ring grooves, so as to realize the direct cooling of the outer rotor winding 12 and the inner rotor 13; the second nozzle 8 and the third nozzle 10 are facing The outer rotor housing 17 has no annular groove, and the outer rotor housing 17 is cooled.

The cooling oil sprayed from the first nozzle 7 and the fourth nozzle 11 to the inside of the motor accumulates at the bottom of the motor, but considering the oil churning loss problem, the oil level needs to be kept at just over the outer rotor housing 17 to avoid The oil-immersed cooling of the outer rotor casing 17 is realized, and the cooling effect is enhanced.

The coarse filter 16 is preferably arranged at the oil outlet of the oil sump 15 to filter out larger impurities in the cooling oil. The oil pump 2 can be selected according to the actual required oil supply and injection pressure.

Since the cooling oil is in direct contact with the motor windings, it is necessary to ensure that the cooling oil is clean and free of moisture. The fine filter 3 can further filter out the smaller impurities in the cooling oil; the drier 6 absorbs the moisture in the cooling oil. Under the suction of the oil pump 2, the cooling oil circulates through the path of oil pan 15-coarse filter 16-radiator 1-oil pump 2-fine filter 3-dryer 6-nozzle to form a circulating cooling.

The first nozzle 7 and the fourth nozzle 11 are directly lubricated by the cooling oil sprayed into the motor and splashed by the inner rotor 13, which is also suitable for motors using rolling bearings.

The cooling oil is made of insulating machine oil, which has high insulation, good chemical stability and thermal oxidation stability, suitable viscosity, low pour point and flocculation point, low volatility, high lightning, and basically does not contain water and impurities. Both can be applied to this embodiment.

Example 2

The motor in this embodiment has an outer stator and inner rotor structure, and the composition of the cooling oil direct spray type motor cooling device in this embodiment is basically the same as that in Embodiment 1.

Shown in Fig. 4, Fig. 5 is another embodiment of the present utility model. As shown in Figures 4 and 5, a cooling oil direct spray motor cooling device is applied to motor cooling with an outer stator inner rotor structure. The cooling oil direct spray type motor cooling device includes a radiator 1, an oil pump 2, a fine filter 3, a dryer 6, a nozzle, an oil pan 15 and a coarse filter 16; there are a plurality of nozzles, respectively the first nozzle 7, the second Two nozzles 8, the third nozzle 10 and the fourth nozzle 11; the radiator 1, the oil pump 2, the fine filter 3 and the drier 6 are connected sequentially through pipelines, and the drier 6 is connected with a plurality of nozzles through pipelines; the inner end of the bottom of the outer casing 9 An oil pan 15 is provided, and the oil pan 15 is connected with a coarse filter 16 , and the coarse filter 16 is connected with the radiator 1 .

The motor with the outer stator and inner rotor structure has the stator 12 outside, the motor housing is divided into two parts, the inner housing 5 and the outer housing 9, and the outer housing 17 is connected to the motor shaft through the first sliding bearing 4 and the second sliding bearing 14 respectively; An annular cavity is formed between the inner and outer shells, the stator 12 is fixed on the inner shell 5; the rotor 13 is fixed on the motor shaft. The second nozzle 8 and the third nozzle 10 are inserted from the outer shell 9, and spray cooling oil in the annular cavity to cool the stator core; the first nozzle 7 and the fourth nozzle 11 pass through the inner and outer shells and directly spray the stator winding Spray cooling oil on both ends of rotor 13 to realize direct cooling of stator and rotor windings. The cooling oil sprayed into the inside of the motor can also accumulate at the bottom of the motor, and because the stator 12 is outside, the oil level can be kept at a higher position (soaked through the stator core). Others are with embodiment 1.

Example 3

The motor in this embodiment has an outer rotor and inner stator structure, and the composition of the cooling oil direct spray type motor cooling device in this embodiment is basically the same as that in Embodiment 1.

Shown in Fig. 6, Fig. 7 is the third embodiment of the present utility model. As shown in Figures 6 and 7, a cooling oil direct spray motor cooling device is applied to motor cooling with an outer rotor inner stator structure. The cooling oil direct spray type motor cooling device includes a radiator 1, an oil pump 2, a fine filter 3, a dryer 6, a nozzle, an oil pan 15 and a coarse filter 16; there are a plurality of nozzles, respectively the first nozzle 7, the second Two nozzles 8, the third nozzle 10 and the fourth nozzle 11; the radiator 1, the oil pump 2, the fine filter 3 and the drier 6 are connected sequentially through pipelines, and the drier 6 is connected with a plurality of nozzles through pipelines; the inner end of the bottom of the outer casing 9 An oil pan 15 is provided, and the oil pan 15 is connected with a coarse filter 16 , and the coarse filter 16 is connected with the radiator 1 .

A motor with an outer rotor inner stator structure, because the stator 12 is inside, because the stator 12 is inside,

The motor casing 9 has only one layer, and the first nozzle 7, the second nozzle 8, the third nozzle 10 and the fourth nozzle 11 are all arranged on the motor casing 9, and spray through the motor casing 9 to the inside of the motor Cool oil. In order to allow the cooling oil to be sprayed onto the stator windings, both ends of the outer rotor housing 17 are respectively provided with 6 ring grooves along the circumferential direction (the structure is the same as that in Figure 3), and the cooling oil sprayed from the first nozzle 7 and the fourth nozzle 11 The stator winding can be reached through these annular slots, enabling direct cooling of the stator winding. The cooling oil sprayed into the motor can also accumulate at the bottom of the motor, but since the rotor 13 is outside, the oil level is kept at a low position (just overflowing the outer rotor housing 17) in consideration of the oil churning loss. Others are with embodiment 1,2.

Claims (5)

1. the direct fountain cooling devcie of motor of cold oil, is characterized in that comprising radiator, oil pump, fine cleaner, drier, nozzle, oil sump and coarse filter; Nozzle is multiple, and described radiator, oil pump, fine cleaner and drier are connected successively by pipeline, and drier is connected with multiple nozzles by pipeline; Multiple nozzles are arranged on electric machine casing, and at least one nozzle is communicated with internal rotor or the stator of motor inner side, and at least one nozzle directly faces toward stator or the rotor case in motor outside in addition; The inner, electric machine casing bottom is provided with oil sump, and oil sump is connected with coarse filter, and coarse filter is connected with radiator.

2. the direct fountain cooling devcie of motor of cold oil according to claim 1, it is characterized in that, the motor of the direct fountain cooling devcie of motor of described cold oil application is for to turning double-rotor machine, describedly comprises electric machine casing, external rotor winding and internal rotor to turning double-rotor machine; External rotor winding is arranged on machine shaft by outer rotor case, and outer rotor case is connected by the first sliding bearing and the second sliding bearing respectively with machine shaft; The annular groove that along the circumferential direction respectively clears the way at the two ends of outer rotor case, nozzle is four, wherein the first nozzle and the 4th nozzle be facing to annular groove, from the cold oil of the first nozzle and the ejection of the 4th nozzle by the through winding of these annular grooves and internal rotor; Second nozzle and the 3rd nozzle are not offered annular groove part facing to outer rotor case.

3. the direct fountain cooling devcie of motor of cold oil according to claim 1, it is characterized in that, the motor of the direct fountain cooling devcie of motor application of described cold oil is the motor with external stator inner rotor core, the described motor stator with external stator inner rotor core outside, electric machine casing is divided into inner housing and shell body two parts, and shell body is connected by the first sliding bearing and the second sliding bearing respectively with machine shaft; Between inner and outer shell, form a toroidal cavity, stator is fixed on inner housing; Rotor is fixed on machine shaft; Nozzle is 4, and wherein second nozzle and the 3rd nozzle insert from shell body, facing to toroidal cavity inner-stator iron core; The first nozzle and the 4th nozzle are through inner and outer shell, facing to stator winding and rotor.

4. the direct fountain cooling devcie of motor of cold oil according to claim 1, it is characterized in that, the motor of the direct fountain cooling devcie of motor application of described cold oil is the motor with external rotor internal stator structure, the stator of the described motor with external rotor internal stator structure is interior, and rotor outside; Electric machine casing only has one deck, and nozzle is four, and the first nozzle, second nozzle, the 3rd nozzle and the 4th nozzle are all arranged on electric machine casing; 6 road annular grooves are along the circumferential direction respectively opened at the two ends of outer rotor case, the first nozzle and the 4th nozzle are facing to annular groove, from the cold oil of the first nozzle and the ejection of the 4th nozzle, by the through stator winding of these annular grooves, second nozzle and the 3rd nozzle are not offered annular groove part facing to outer rotor case.

5. the direct fountain cooling devcie of motor of cold oil according to claim 1, is characterized in that: described cold oil is insulation machine oil.

Images